Circular saw



FIG. 1 is a right rear perspective view of a circular saw showing our new design;

FIG. 2 is a right elevation view thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a left elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a left front perspective thereof. 

The ornamental design for a circular saw, as shown and described. 